CVE-2022-20753: Cisco Small Business RV Series Routers Remote Code Execution Vulnerability

Severity: high (CVSS 7.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-05-04 · updated 2026-06-17
Weakness: CWE-121

Description

A vulnerability in web-based management interface of Cisco Small Business RV340 and RV345 Routers could allow an authenticated, remote attacker to execute arbitrary code on an affected device. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending malicious input to an affected device. A successful exploit could allow the attacker to execute remote code on the affected device. To exploit this vulnerability, an attacker would need to have valid Administrator credentials on the affected device.

Affected products

Cisco Rv340 Firmware: before 1.0.03.27 — fixed in 1.0.03.27
Cisco Rv340W Firmware: before 1.0.03.27 — fixed in 1.0.03.27
Cisco Rv345 Firmware: before 1.0.03.27 — fixed in 1.0.03.27
Cisco Rv345P Firmware: before 1.0.03.27 — fixed in 1.0.03.27

How to fix

Upgrade to a fixed version: Cisco Rv340 Firmware 1.0.03.27; Cisco Rv340W Firmware 1.0.03.27; Cisco Rv345 Firmware 1.0.03.27; Cisco Rv345P Firmware 1.0.03.27. Check the vendor advisory for mitigations.

References

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